Fix linalg.generic access of hoisted constants

Summary: Otherwise the added @generic_const_int will fail

Reviewers: nicolasvasilache, rriddle, mravishankar

Subscribers: mehdi_amini, jpienaar, burmako, shauheen, antiagainst, arpith-jacob, mgester, lucyrfox, liufengdb, Joonsoo, grosul1, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D77109